1. of or associated with a church (especially a Christian Church); - Example: "ecclesiastic history"[syn: ecclesiastical, ecclesiastic]

The Collaborative International Dictionary of English v.0.48:

Ecclesiastical \Ec*cle`si*as"tic*al\, a. [See Ecclesiastical,
a.]
Of or pertaining to the church; relating to the organization
or government of the church; not secular; as, ecclesiastical
affairs or history; ecclesiastical courts.
[1913 Webster]
Every circumstance of ecclesiastical order and
discipline was an abomination. --Cowper.
[1913 Webster]
Ecclesiastical commissioners for England, a permanent
commission established by Parliament in 1836, to consider
and report upon the affairs of the Established Church.
Ecclesiastical courts, courts for maintaining the
discipline of the Established Church; -- called also
Christian courts. [Eng.]
Ecclesiastical law, a combination of civil and canon law as
administered in ecclesiastical courts. [Eng.]
Ecclesiastical modes (Mus.), the church modes, or the
scales anciently used.
Ecclesiastical States, the territory formerly subject to
the Pope of Rome as its temporal ruler; -- called also
States of the Church.
[1913 Webster]

WordNet (r) 3.0 (2006):

ecclesiastical
adj 1: of or associated with a church (especially a Christian
Church); "ecclesiastic history" [syn: ecclesiastical,
ecclesiastic]